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Looks like a cool article, but it also looks like it explains itself. Please follow suit and explain what you want to know that the article itself doesn't tell you about these pictures and the underlying differences. Also, please explain what this question has to do with human factors (if anything really).
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Nick StaunerApr 2 '14 at 1:53

it seems that the distance between mouth and eye is farther.
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Jim ThioApr 2 '14 at 1:56

the front face of smarter people tend to expand.
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Jim ThioApr 2 '14 at 1:56

Ah I see. The grids are distorted in the right and left. That is why I cannot see any difference by seeing how points differ according to the grids.
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Jim ThioApr 2 '14 at 3:48

Faces that are perceived as highly intelligent are rather prolonged with a broader distance between the eyes, a larger nose, a slight upturn to the corners of the mouth, and a sharper, pointing, less rounded chin. By contrast, the perception of lower intelligence is associated with broader, more rounded faces with eyes closer to each other, a shorter nose, declining corners of the mouth, and a rounded and massive chin.

These differences only relate to perceived intelligence, not measured intelligence.
From the conclusion:

No specific traits that correlated with real intelligence were detected with standard geometric morphometric methods. Men and women with specific facial traits were perceived as highly intelligent. However, these faces of supposed high and low intelligence probably represent nothing more than a cultural stereotype because these morphological traits do not correlate with the real intelligence of the subjects.

The authors speculate on (but did not analyze) other factors that might explain the perceptibility of actual intelligence apart from the factors visible in the composites, including:

Particular configurations of eyes or gaze, colour of eyes, hair and skin, or skin texture.

All of these characteristics would be wiped out in facial composites, so you probably can't actually perceive intelligence accurately from the images you've embedded according to this study.